Riverside police officers are seeking two suspects who robbed a group of people on Mt. Rubidoux Monday night, June 6, after showing them weapons, authorities said.

Riverside Police Lt. Christian Dinco said a group of four people was hiking a trail on the mountain around 9:30 p.m. when two men approached the group.

He said one of the men showed a black semi-automatic handgun while the other man showed an 18-inch pipe.

They demanded the group’s cell phones, Dinco said, and two of the people gave them up. He said the other two in the group said they didn’t have cell phones.

The robbers became scared and fled when they heard other people coming up the trail, Dinco said.

He said authorities were never able to find the robbers after a significant search of the mountain.

Dinco encouraged anyone with information on the robbers or their whereabouts to call authorities by dialing 911. He said the threat of violence was enough that authorities would want to know the robbers’ whereabouts as soon as possible.

Contact the writer: 951-368-9693, agroves@pe.com or @AlexDGroves on Twitter.

Alex Groves writes about casinos for the entertainment team at Southern California News Group. He started his first full-time gig as a breaking news reporter for The Press-Enterprise in 2015 but has also written stories on arts programs at local high schools, dining and events. In his free time, Alex enjoys hiking and traveling. A craft beer enthusiast, Alex likes to bring back an IPA as a souvenir from every new place he travels.